[IMP] point_of_sale: Update refund.rst and seasonal_discount.rst

point_of_sale/shop/refund.rst

@@ -1,21 +1,21 @@
 ==================================
-How to return and refund products?
+Accept returns and refund products
 ==================================
 
-To refund a customer, from the PoS main view, you have to insert
-negative values. For instance in the last order you count too many
-``pumpkins`` and you have to pay back one.
+Having a well-thought-out return policy is key to attract - and keep -
+your customers. Making it easy for you to accept and refund those
+returns is therefore also a key aspect of your *Point of Sale*
+interface.
+
+From your *Point of Sale* interface, select the product your customer
+wants to return, use the +/- button and enter the quantity they need to
+return. If they need to return multiple products, repeat the process.
 
 .. image:: media/refund01.png
     :align: center
 
-You can see that the total is negative, to end the refund, you only have
-to process the payment.
+As you can see, the total is in negative, to end the refund you simply
+have to process the payment.
 
 .. image:: media/refund02.png
     :align: center
-
-.. seealso::
-    * :doc:`cash_control`
-    * :doc:`invoice`
-    * :doc:`seasonal_discount`